On this date in 1941, this happened.
These sixteen blindfolded Yugoslav Partisans about to be shot at Smederevska Palanka were
joined in death by one conscientious German soldier who refused to help carry out the massacre. (Or not. See comments.)
The Partisans were Tito’s Communist guerrilla movement against the Nazi occupation and while they were up against it at this early date, they would in due time wind up on the winning side and help birth the postwar government.
Their legacy remains in every European sports page as the namesake of the Belgrade sports association Partizan founded immediately after the war. It’s the umbrella entity for the frequent Serbian football and basketball champions as well as a variety of other sports. (Current world tennis no. 1 Novak Djokovic played for Partizan, for instance.)